Method of forming compound receptacles.



PATBNTED AUG. 11, 1908.

APPLIGTION FILED JAN. 2, 1906.

lavan/Kor ARTHUR O. BADGER, OF NEWTON CENTER, MASSACHUSETTS.

METHOD FORMING COMPOUND RECEPTACLES.

Specication of Letters Patent.

Patented Aug. 11, 1908.

Application filed January 2, 1906. SerialNo. 294,042.

To all whom it may concern.'

Be it known that I, ARTHUR O. BADGER,

of Newton Center, in the county of Middlesex and State of Massachusetts,have invented certain new and useful Improvements in Methods of FormingCompound Receptacles, of which the following is a specification.

This invention relates to a new and improved method of makinglcompoundtubes or receptacles.

Figure l shows asectional view. of the outer member of a receptacle tobe made in accordance with my invention. Fig. 2 is a like view showingthe inner wall of the said receptacle covered with a coating of solder.Fig. 3 is a sectional view of the inner member having its outer surfacecovered with a coating of solder. Fig. 4 is a view showing the innermember nested in the outer member, their complementary solder coatingsin engagement, anda conventional cap closing said inner lining andconnecting with any suitable air-pressure supply. Fig. 5 is a sectionalview, showing two solder coatings united, and the inner and outer memberbonded uniformly together.

I-Ieretofore, great difficulty has been eX- perienced in formingavessel, or receptacle, of two different metals, as steel and lead, ortin, owing to the diiculty experienced in securing the uniform unionbetween the inner and outer member. This difficulty I overcome by myimproved method, and am enabled by said method to commercially formcompound receptacles having a uniform and satisfactory bonded connectionbetween the inner and outer members.

While, in the description, I have referred to a receptacle composed oftwo members, and a receptacle where the inner member is composed of tinor lead, and the outer member composed of steel, such reference is forpurposes of illustration, and I do not wish to be understood as limitingmy invention to that scope.

l represents a cylindrical member, closed at its lower end and open atits upper end. This member may be composed of steel, or any otherdesired material.

2 represents a coating of solder, applied by any desired fluX, coatingthe inner surface of the outer member 1.

3 represents what I term the "inner member, which may be composed oflead or Zinc, and is provided on its outer surface with a coating 4, ofa suitable solder.

The members i so prepared are nested one within the other, as in Fig. 4,with the coating 2 in engagement with the coating 4. Thereafter, whenthe walls of the member l are sufficiently strong to withstand thestrain, a cap 10 is secured in any desired way to the top of the member3, a pipe 1l leading from said cap to any suitable air-pressure supply,and the parts are secured in any suitable frame or device while underpressure. In cases where the material of the member l is notsufficiently strong to withstand the pressure, the members nested, as

shown in Fig. 4, may themselves be placed in any suitable chamberconstructed to hold the members and maintain them in place during thesubsequent operations. In that case, after the parts 'are assembled, asshown in Fig. 4, heat is then applied sufficiently to soften thecoating, and when the inner member is composed of tin or lead, these arealso more or less influenced by the heat. The pressure is rst applied inorder to force the coated wall of the member 3 against the complementalwall of the member 1 evenly. After this is done heat is applied untiltherequired union between the two walls is secured. In most cases, Ihave found where I employ steel for the outer member and tin or lead forthe inner member, a pressure of one hundred pounds to the square inchwill accomplish the desired result, but this pressure may be varied,depending upon the conditions attending the particular piece of work. Bythis method, the inner member is forced against the outer memberuniformly at all points, and this pressure can be maintained during thesoftening of the coating, and continued until after the parts haveunitedand cooled, thereby effecting a uniform and permanent unionbetween the inner and outer member.

It is to be understood that the drawings exaggerate the thickness of thelining 2 and coating 4, in order that the presence thereof will beperceptible to the eye in the sectional views.

Where in the specification and claims I have referred to coating of thetwo parts to be united, I wish to be understood as referring to acoating as distinguished from a lining, so called. Said coating shouldbe as thin as possible, and a convenient method of applying said coatingis by the so-called dry tin method, that is to say, the coating isapplied to the particular surface and then wiped, so called, to stripfrom said surface any surplus material. While in the specification andclaims I have referred to a receptacle, I do not Wish to be understoodas limiting my invention and claims to a dish, for instance, as myinvention is equally applicable, and designed by me to embrace anyinclosing structure, Whether closed at one end, as a dish, or tank, oropen at both ends, as a pipe,

i and by the Word receptacle I desire and intend to embrace and coverthe said structure and also analogous classes of structures.

Having thus explained the nature of my invention and described a Way ofconstructing and using the same, though Without attempting to set forthall of the forms in Which it may be used, or all of the modes of itsuse, What I claim and desire to secure by Letters Patent is 1. Themethod of applying a lining to a receptacle, which consists in coatingthe outer surface of the lining and the inner surface of the receptaclewith a suitable solder, nesting ,coating the opposing faces of saidsurface and said parts to heat to unite the lining and surface.

In testimony whereof I have aliixed my signature, in presence of twoWitnesses.

ARTHUR C. BADGER. I/Vitnesses:

E. BATCHELDER, ARTHUR H. BROWN.

